These entries are queried from radb.net using whois, you can try my project getting these.
:AS400337 route: 38.7.152.0/22 origin: AS400337 descr: Route Registered for Cogent Communications Customer - NH Broadband geoidx: US mnt-by: MAINT-AS174 changed: neteng [at] cogentco.com 20220315 #16:59:28Z source: RADB last-modified: 2023-11-13T16:10:08Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 38.51.144.0/22 origin: AS400337 descr: Route Registered for Cogent Communications Customer - NH Broadband geoidx: United States mnt-by: MAINT-AS400337 changed: nhbbadmin [at] nhec.com 20220802 #13:54:08Z source: RADB last-modified: 2023-11-13T16:11:50Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 66.231.210.0/24 origin: AS400337 descr: Proxy route object for NH Broadband, LLC admin-c: IA93-ARIN tech-c: IA93-ARIN notify: ip-admin [at] firstlight.net mnt-by: MAINT-SOVER-NOC changed: jhall [at] firstlight.net 20220713 source: RADB last-modified: 2023-11-13T16:11:44Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 66.231.211.0/24 origin: AS400337 descr: Proxy route object for NH Broadband, LLC admin-c: IA93-ARIN tech-c: IA93-ARIN notify: ip-admin [at] firstlight.net mnt-by: MAINT-SOVER-NOC changed: jhall [at] firstlight.net 20220713 source: RADB last-modified: 2023-11-13T16:11:44Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2607:9740::/32 origin: AS400337 descr: 579 Tenney Mountain Highway Plymouth NH 03264-3154 United States member-of: RS-NHBB admin-c: NBA59-ARIN tech-c: COLED67-ARIN tech-c: CONEX1-ARIN tech-c: NBA59-ARIN mnt-by: MNT-NBL-82 created: 2024-02-22T17:22:35Z last-modified: 2024-02-22T17:22:35Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source